<template>
  <div class="upload-file">
    <el-upload multiple :action="uploadFileUrl" :before-upload="handleBeforeUpload" :file-list="fileList" :limit="limit"
      :on-change="handleChange" :on-error="handleUploadError" :on-exceed="handleExceed"
      :on-success="handleUploadSuccess" :show-file-list="false" :headers="headers" class="upload-file-uploader"
      ref="upload" :auto-upload="true" style="display: inline-block" :disabled="disabled">
      <!-- 上传按钮 -->
      <el-button type="primary" :disabled="disabled">选取文件</el-button>
      <!--<el-button style="margin-left: 10px;" size="small" type="success" @click="submitUpload">上传到服务器</el-button>-->
    </el-upload>
    <!--<el-button style="display: inline-block;float: right;" type="success" @click="submitUpload">上传到服务器</el-button>-->
    <!-- 上传提示 -->
    <div class="el-upload__tip" v-if="showTip">
      请上传
      <template v-if="fileSize"> 大小不超过 <b style="color: #f56c6c">{{ fileSize }}MB</b> </template>
      <template v-if="fileType"> 格式为 <b style="color: #f56c6c">{{ fileType.join("/") }}</b> </template>
      的文件
    </div>
    <!-- 文件列表 -->
    <transition-group class="upload-file-list el-upload-list el-upload-list--text" name="el-fade-in-linear" tag="ul">
      <template v-for="(file, index) in fileList">
        <li :key="file.uid" class="el-upload-list__item ele-upload-list__item-content" v-if="file.name && file.attachId">
            <!--<el-link :href="`${baseUrl}${file.attachPath}`" :underline="false" target="_blank">-->
            <el-link @click="handleDownload(file)" :underline="false" target="_blank">
              <span class="el-icon-document">&nbsp;&nbsp;{{ getFileName(file.name) }} </span>
            </el-link>
            <div class="ele-upload-list__item-content-action">
              <el-link :underline="false" @click="handleDelete(index,file)" type="danger"
                :disabled="disabled">删除</el-link>
            </div>
          </li>
      </template>
    </transition-group>
  </div>
</template>

<script setup>
import { getToken } from "@/utils/auth";
import { upLoadFile, downLoadFile, deleteFile } from "@/api/system/attachFile";

const props = defineProps({
  modelValue: [String, Object, Array],
  // 数量限制
  limit: {
    type: Number,
    default: 5,
  },
  // 大小限制(MB)
  fileSize: {
    type: Number,
    default: 100,
  },
  // 文件类型, 例如['png', 'jpg', 'jpeg']
  fileType: {
    type: Array,
    //default: () => ["doc", "xls", "ppt", "txt", "pdf"],
    default: () => [],
  },
  fileNameReg: {
    type: Object
  },
  // 是否显示提示
  isShowTip: {
    type: Boolean,
    default: true
  },
  disabled: {
    type: Boolean,
    default: false
  },
  uploadUrl: {
    type: String,
    default: '/attachment/uploadFile'
  },
  downloadUrl: {
    type: String,
    default: '/attachment/downLoadFile'
  },
});

const { proxy } = getCurrentInstance();
const emit = defineEmits();
const number = ref(0);
const uploadList = ref([]);
const baseUrl = import.meta.env.VITE_APP_BASE_API;
const uploadFileUrl = ref(baseUrl + props.uploadUrl); // 上传的图片服务器地址
const downloadFileUrl = ref(baseUrl + props.downloadUrl)
const headers = ref({ token: "tokrn" + getToken() });
const fileList = ref([]);
const showTip = computed(
  () => props.isShowTip && (props.fileType || props.fileSize)
);

watch(() => props.modelValue, val => {
  if (val) {
    let temp = 1;
    // 首先将值转为数组
    const list = Array.isArray(val) ? val : props.modelValue.split(',');
    // 然后将数组转为对象数组
    console.log(val)
    fileList.value = list.map(item => {
      if (typeof item === "string") {
        item = { name: item, url: item };
      }
      item.uid = item.attachId || new Date().getTime() + temp++;
      item.name = item.attachName || item.name;
      item.url = item.attachPath || item.url;
      return item;
    });
  } else {
    fileList.value = [];
    return [];
  }
}, { deep: true, immediate: true });

// 上传前校检格式和大小
function handleBeforeUpload(file) {
  // 校检文件类型
  if (props.fileType.length) {
    let fileExtension = "";
    if (file.name.lastIndexOf(".") > -1) {
      fileExtension = file.name.slice(file.name.lastIndexOf(".") + 1);
    }
    const isTypeOk = props.fileType.some((type) => {
      if (file.type.indexOf(type) > -1) return true;
      if (fileExtension && fileExtension.indexOf(type) > -1) return true;
      return false;
    });
    if (!isTypeOk) {
      proxy.$modal.msgError(`文件格式不正确, 请上传${props.fileType.join("/")}格式文件!`);
      return false;
    }
  }
  // 校检文件大小
  if (props.fileSize) {
    const isLt = file.size / 1024 / 1024 < props.fileSize;
    if (!isLt) {
      proxy.$modal.msgError(`上传文件大小不能超过 ${props.fileSize} MB!`);
      return false;
    }
  }

  let isNameReg = true
  emit('beforeUpload', file, flag => {
    isNameReg = flag
  })
  if(!isNameReg) { return isNameReg }

  proxy.$modal.loading("正在上传文件，请稍候...");
  number.value++;
  return true;
}


function handleChange(file, fileList) {
  //	console.log(JSON.parse(JSON.stringify(file)))
  //	console.log(JSON.parse(JSON.stringify(fileList)))
  fileList.value = fileList;
}

// 文件个数超出
function handleExceed() {
  proxy.$modal.msgError(`上传文件数量不能超过 ${props.limit} 个!`);
}

// 上传失败
function handleUploadError(err) {
  proxy.$modal.msgError("上传文件失败");
}

// 上传成功回调
function handleUploadSuccess(res, file) {
  uploadList.value.push({ attachId: res.data[0].attachId, name: res.data[0].attachName, url: res.data[0].attachPath });
  if (uploadList.value.length === number.value) {
    fileList.value = fileList.value.filter(f => f.url !== undefined).concat(uploadList.value);
    uploadList.value = [];
    number.value = 0;
    //emit("update:modelValue", listToString(fileList.value));
    proxy.$modal.closeLoading();
    proxy.$modal.msgSuccess("上传文件成功");
    emit('uploadSuccess', fileList.value)
  }
}

// 删除文件
function handleDelete(index, file) {
  fileList.value.splice(index, 1);
  //emit("update:modelValue", listToString(fileList.value));
  // deleteFile(file.attachId).then(res => {
  // 	    //console.log(res)
  // 	if (res.code==200) {
  //       proxy.$modal.msgSuccess("删除文件成功");

  //   }else{
  //       proxy.$modal.msgError("删除文件失败");

  //   }
  // });
}

// 下载文件
function handleDownload(file) {
  var query = {
    attachId: file.attachId,
    name: file.attachName
  }
  location.href = downloadFileUrl.value + "?attachId=" + encodeURIComponent(query.attachId);
}

// 获取文件名称
function getFileName(name) {
  //console.log(name)
  return name
  //if (name.lastIndexOf("/") > -1) {
  //  return name.slice(name.lastIndexOf("/") + 1);
  //} else {
  //  return "";
  //}
}

// 对象转成指定字符串分隔
function listToString(list, separator) {
  let strs = "";
  separator = separator || ",";
  for (let i in list) {
    if (undefined !== list[i].url) {
      strs += list[i].url + separator;
    }
  }
  return strs != '' ? strs.substr(0, strs.length - 1) : '';
}

//上传附件
function submitUpload(id) {
  console.log("232232")
  if (fileList.value.length === 0) {
    proxy.$modal.msgWarning("请选取文件");
    return
  }
  const formData = new FormData()
  // 因为要传一个文件数组过去，所以要循环append
  fileList.value.forEach((file) => {
    console.log(JSON.stringify(file))
    formData.append('file', file.raw)
  })
  //  for(var i = 0; i<fileList.value.length;i++) {
  //		   formData.append('file',fileList.value[i])
  //	 	}
  //formData.append('id', id) // 自定义参数
  //  console.log(JSON.parse(JSON.stringify(formData)))
  upLoadFile(formData).then(res => {
    console.log(res)
    if (res.code == 200) {
      proxy.$modal.msgSuccess("上传文件成功");
      //this.fileList = [];
      console.log(fileList.value)

    } else {
      proxy.$modal.msgError("上传文件失败");

    }
  });
  //  proxy.$axios({
  //  	headers:{
  //  		contentType:'multipart/form-data'
  //  	},
  //      method: "post",
  //      url: uploadFileUrl,
  //      data: formData,                          
  //  	}).then((res) => {
  //      console.log(res);
  //      if (res.code==200) {
  //          proxy.$modal.msgSuccess("上传文件成功");
  //          //this.fileList = [];
  //          this.$parent.$parent.fatherMethod();
  //      }else{
  //          proxy.$modal.msgError("上传文件失败");
  //          
  //      }
  //  });
  //this.$refs.upload.submit();

}
defineExpose({
  fileList
});
</script>

<style scoped lang="scss">
.upload-file {
  width: 100%;
}

.upload-file-uploader {
  margin-bottom: 5px;
}

.upload-file-list .el-upload-list__item {
  border: 1px solid #e4e7ed;
  line-height: 2;
  margin-bottom: 10px;
  position: relative;
}

.upload-file-list .ele-upload-list__item-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: inherit;
}

.ele-upload-list__item-content-action .el-link {
  margin-right: 10px;
}
</style>
